An undersea antifouling agent applied by impregnation for the purpose of preventing aquatic organisms for a long period of time from depositing on, for example, nets for culturing, stationary net fishing, etc., and materials for supporting the net, such as ropes; a net for preventing medusas from invading an intake of sea water for cooling; and materials for shore protection. The first invention relates to an undersea antifouling agent comprising: (A) at least one member selected from among (A1) 2-(thiocyanomethylthis)benzothiazole, (A2) tetraethylthiuram disulfide, (A3) 2,4,5,6-tetrachloro-1,3-dicyanobenzene, (A4) N-(ethylmethylphenyl)dichloromaleimide, and (A5) N-(diethylphenyl)dichloromaleimide; (B) a film-forming material; and (C) at least one compound selected from among dialkyl polysulfides represented by the general formula R₁-(S)n-R₂. The second invention relates to another undersea antifouling agent further comprising the following component (D) polybutene with a degree of polymerization of 2 to 100, in addition to the aforementioned components (A) to (C). The effect of incorporating component (C) and, in addition, component (D) in the antifouling agent resides in that the velocity of releasing component (A) as the active ingredient of the antifouling agent can appropriately be controlled thereby, so that the antifouling effect can be retained for a long period of time.
一种海底防污剂,采用浸渍法使用,目的是防止
水生
生物长期沉积在例如养殖网、固定网捕鱼等网具上,以及用于支撑网具的材料,如绳索;用于防止鳉鱼侵入冷却海
水进
水口的网;以及用于保护海岸的材料。第一项发明涉及一种海底防污剂,包括(A) 至少一种选自 (A1) 2-(
硫氰基甲基)
苯并噻唑、(A2)
二硫化四乙基秋兰姆、(A3) 2,4,5,6-四
氯-1,3-二
氰基苯、(A4) N-(乙基甲基苯基)二
氯马来
酰亚胺和 (A5) N-(二
乙基苯基)二
氯马来
酰亚胺的成员;(C) 至少一种选自通式 R₁-(S)n-R₂ 所代表的二烷基多
硫化物的化合物。第二项发明涉及另一种海底防污剂,除上述成分(A)至(C)外,还包括以下成分 (D)聚合度为 2 至 100 的聚
丁烯。在防污剂中加入组分(C)和组分(D)的效果在于,可以适当控制作为防污剂有效成 分的组分(A)的释放速度,从而可以长期保持防污效果。